<template>
  <view class="container">
    <!-- 空白页 -->
    <view v-if="!hasLogin || empty === true" class="empty">
      <image src="/static/emptyCart.jpg" mode="aspectFit"></image>
      <view v-if="hasLogin" class="empty-tips">
        空空如也
        <navigator
          class="navigator"
          v-if="hasLogin"
          url="../index/index"
          open-type="switchTab"
          >随便逛逛></navigator
        >
      </view>
      <view v-else class="empty-tips">
        空空如也
        <view class="navigator" @click="navToLogin">去登陆></view>
      </view>
    </view>
    <view v-else>
      <!-- 列表 -->
      <view class="cart-list">
        <block v-for="(item, index) in cartList" :key="item.skuId">
          <view class="cart-item" :class="{ 'b-b': index !== cartList.length - 1 }">
            <view class="image-wrapper">
              <image
                :src="item.skuImg"
                class="loaded"
                mode="aspectFill"
                lazy-load
                @load="onImageLoad('cartList', index)"
                @error="onImageError('cartList', index)"
              ></image>
              <view
                class="yticon icon-xuanzhong2 checkbox"
                :class="{ checked: item.checked }"
                @click="check('item', index, item.skuId)"
              ></view>
            </view>
            <view class="item-right">
              <text class="clamp title">{{ item.skuName }}</text>
              <!-- <text class="attr">{{item.attr_val}}</text> -->
              <text class="price">¥{{ item.price | moneyFormatter }}</text>
              <uni-number-box
                class="step"
                :min="1"
                :max="item.stock"
                :value="item.number > item.stock ? item.stock : item.number"
                :isMax="item.number >= item.stock ? true : false"
                :isMin="item.number === 1"
                :index="index"
                @eventChange="numberChange($event, item.skuId)"
              ></uni-number-box>
            </view>
            <text
              class="del-btn yticon icon-fork"
              @click="deleteCartItem(item.skuId)"
            ></text>
          </view>
        </block>
      </view>
      <!-- 底部菜单栏 -->
      <view class="action-section">
        <view class="checkbox">
          <image
            :src="allChecked ? '/static/selected.png' : '/static/select.png'"
            mode="aspectFit"
            @click="check('all')"
          ></image>
          <view class="clear-btn" :class="{ show: allChecked }" @click="clearCart">
            清空
          </view>
        </view>
        <view class="total-box">
          <text class="price">¥{{ cart.totalPrice | moneyFormatter }}</text>
          <text class="coupon">
            已优惠
            <text>{{ cart.totalCoupon | moneyFormatter }}</text>
            元
          </text>
        </view>
        <button type="primary" class="no-border confirm-btn" @click="createOrder">
          去结算
        </button>
      </view>
    </view>
  </view>
</template>

<script>
import { mapState } from "vuex";
import { mapGetters } from "vuex";
import {
  detail,
  update,
  choose,
  checkItem as checkCartItem,
  checkAll,
  deleteCart,
  clear,
} from "@/api/oms/cart.js";
import uniNumberBox from "@/components/uni-number-box.vue";
export default {
  components: {
    uniNumberBox,
  },
  data() {
    return {
      total: 0, //总价格
      allChecked: false, //全选状态  true|false
      empty: false, //空白页现实  true|false
      cart: {},
      cartList: [],
    };
  },
  onLoad() {
    //加载页面时，查询购物车详情
    this.loadData();
  },
  watch: {
    //显示空白页
    cartList(e) {
      let empty = e.length === 0 ? true : false;
      if (this.empty !== empty) {
        this.empty = empty;
      }
    },
  },
  computed: {
    ...mapGetters(["hasLogin"]),
  },
  methods: {
    //请求数据
    async loadData() {
      const that = this;
      detail().then((response) => {
        const data = response.data;
        if (data) {
          this.cart = data;
          this.cartList = data.items;
          this.calcTotal(); //计算总价
        }
      });
    },
    //监听image加载完成
    onImageLoad(key, index) {
      console.log("onImageLoad");
      this.$set(this[key][index], "loaded", "loaded");
    },
    //监听image加载失败
    onImageError(key, index) {
      console.log("onImageError");
      this[key][index].image = "/static/errorImage.jpg";
    },
    navToLogin() {
      uni.navigateTo({
        url: "/pages/public/login",
      });
    },
    //选中状态处理
    check(type, index, skuId) {
      if (type === "item") {
        const cartItemCheckBo = {};
        cartItemCheckBo.check = !this.cartList[index].checked ? 1 : 0;
        cartItemCheckBo.skuId = skuId;
        checkCartItem(cartItemCheckBo).then((response) => {
          this.loadData();
        });
      } else {
        const checked = !this.allChecked;
        const check = !this.allChecked ? 1 : 0;
        checkAll(check).then((response) => {
          this.loadData();
        });
        this.allChecked = checked;
      }
      this.calcTotal(type);
    },
    //数量
    numberChange(data, skuId) {
      const cartItemBo = {};
      cartItemBo.number = data.number;
      cartItemBo.skuId = skuId;
      console.log(cartItemBo);
      update(cartItemBo).then((response) => {
        this.loadData();
      });
    },
    //删除
    deleteCartItem(skuId) {
      deleteCart(skuId).then((response) => {
        this.loadData();
      });
      uni.hideLoading();
    },
    //清空
    clearCart() {
      uni.showModal({
        content: "清空购物车？",
        success: (e) => {
          if (e.confirm) {
            clear().then((response) => {
              this.loadData();
            });
          }
        },
      });
    },
    //计算总价
    calcTotal() {
      let cart = this.cart;
      let list = this.cartList;
      if (list.length === 0) {
        this.empty = true;
        return;
      }
      let checked = true;
      list.forEach((item) => {
        if (item.checked != true && checked === true) {
          checked = false;
        }
      });
      this.allChecked = checked;
      //this.total = Number(cart.totalPrice.toFixed(2));
      this.total = cart.totalPrice;
    },
    //创建订单
    createOrder() {
      // let list = this.cartList;
      // let goodsData = [];
      // list.forEach(item => {
      // 	if (item.checked) {
      // 		goodsData.push({
      // 			attr_val: item.attr_val,
      // 			number: item.number
      // 		})
      // 	}
      // })

      uni.navigateTo({
        url: `/pages/order/createOrder`,
      });
      this.$api.msg("跳转下一页 sendData");
    },
  },
};
</script>

<style lang="scss">
.container {
  padding-bottom: 134upx;

  /* 空白页 */
  .empty {
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    height: 100vh;
    padding-bottom: 100upx;
    display: flex;
    justify-content: center;
    flex-direction: column;
    align-items: center;
    background: #fff;

    image {
      width: 240upx;
      height: 160upx;
      margin-bottom: 30upx;
    }

    .empty-tips {
      display: flex;
      font-size: $font-sm + 2upx;
      color: $font-color-disabled;

      .navigator {
        color: $uni-color-primary;
        margin-left: 16upx;
      }
    }
  }
}

/* 购物车列表项 */
.cart-item {
  display: flex;
  position: relative;
  padding: 30upx 40upx;

  .image-wrapper {
    width: 230upx;
    height: 230upx;
    flex-shrink: 0;
    position: relative;

    image {
      border-radius: 8upx;
    }
  }

  .checkbox {
    position: absolute;
    left: -16upx;
    top: -16upx;
    z-index: 8;
    font-size: 44upx;
    line-height: 1;
    padding: 4upx;
    color: $font-color-disabled;
    background: #fff;
    border-radius: 50px;
  }

  .item-right {
    display: flex;
    flex-direction: column;
    flex: 1;
    overflow: hidden;
    position: relative;
    padding-left: 30upx;

    .title,
    .price {
      font-size: $font-base + 2upx;
      color: $font-color-dark;
      height: 40upx;
      line-height: 40upx;
    }

    .attr {
      font-size: $font-sm + 2upx;
      color: $font-color-light;
      height: 50upx;
      line-height: 50upx;
    }

    .price {
      height: 50upx;
      line-height: 50upx;
    }
  }

  .del-btn {
    padding: 4upx 10upx;
    font-size: 34upx;
    height: 50upx;
    color: $font-color-light;
  }
}

/* 底部栏 */
.action-section {
  /* #ifdef H5 */
  margin-bottom: 100upx;
  /* #endif */
  position: fixed;
  left: 30upx;
  bottom: 30upx;
  z-index: 95;
  display: flex;
  align-items: center;
  width: 690upx;
  height: 100upx;
  padding: 0 30upx;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 0 20upx 0 rgba(0, 0, 0, 0.5);
  border-radius: 16upx;

  .checkbox {
    height: 52upx;
    position: relative;

    image {
      width: 52upx;
      height: 100%;
      position: relative;
      z-index: 5;
    }
  }

  .clear-btn {
    position: absolute;
    left: 26upx;
    top: 0;
    z-index: 4;
    width: 0;
    height: 52upx;
    line-height: 52upx;
    padding-left: 38upx;
    font-size: $font-base;
    color: #fff;
    background: $font-color-disabled;
    border-radius: 0 50px 50px 0;
    opacity: 0;
    transition: 0.2s;

    &.show {
      opacity: 1;
      width: 120upx;
    }
  }

  .total-box {
    flex: 1;
    display: flex;
    flex-direction: column;
    text-align: right;
    padding-right: 40upx;

    .price {
      font-size: $font-lg;
      color: $font-color-dark;
    }

    .coupon {
      font-size: $font-sm;
      color: $font-color-light;

      text {
        color: $font-color-dark;
      }
    }
  }

  .confirm-btn {
    padding: 0 38upx;
    margin: 0;
    border-radius: 100px;
    height: 76upx;
    line-height: 76upx;
    font-size: $font-base + 2upx;
    background: $uni-color-primary;
    box-shadow: 1px 2px 5px rgba(217, 60, 93, 0.72);
  }
}

/* 复选框选中状态 */
.action-section .checkbox.checked,
.cart-item .checkbox.checked {
  color: $uni-color-primary;
}
</style>
